NXP and STM make NFC<->I2C EEPROM chips that are <$1 which can easily be used to transmit data from a mobile device directly into the target. https://www.nxp.c

NXP and STM make NFC<->I2C EEPROM chips that are <$1 which can easily be used to transmit data from a mobile device directly into the target. https://www.nxp.com/products/rfid-nfc/nfc-hf/connected-nfc-tags/ntag-ic-plus-2k-nfc-forum-type-2-tag-with-ic-interface:NTAG_I2C https://www.nxp.com/products/rfid-nfc/nfc-hf/connected-nfc-t... https://www.st.com/en/nfc/st25dv-i2c-series-dynamic-nfc-tags.html https://www.st.com/en/nfc/st25dv-i2c-series-dynamic-nfc-tags...